fifth diseasefifth disease
A usually mild disease, primarily of children, that is caused by a parvovirus and is characterized by fever, a prominent, often bright red rash on the cheeks that may spread to the trunk and limbs, and swollen, painful joints. Also called erythema infectiosum .
Origin of fifth diseaseFrom its being fifth in frequency of rash-producing childhood diseases
Historically classified as the fifth of the classical childhood skin rashes or exanthems, after measles, scarlet fever, rubella, and Dukes' disease.